Washing apparatus for coali



April 17, 1928.

P. WOLF WASHING APPARATUS FOR GOALS Filed June 28. 1926 2 Sheets-Sheet 1 April 17, 1928. 1,666,189

P. WOLF WASHING APPARATUS FOR GOALS Filed June 2 1926 2 Sheets-Sheet 2 3 f Z .I .1: H. 1.1

[- Pat nted Apr. 17,1928.

rnrmrrn womaor rams, amen.

wasme nrr'rus' 'roa coats.

' Application filed June 28, 1826. Serial No. 119.016; and in France Ju1y-3,'1;925.

The invention relates to improvements in coal washing apparatus of the kind in which a mechanically actuated piston produces pulsation of the water contained within the Washing vat.

. It is already known to use a mechanical pistoning devlce in which the separation of the products is etfected by means of a stream of water pulsating through the bed of ma- 4 I0 terials to be washed, the evacuation of the slates or other heavy substances being auto-- matically regulated according-to the thick ness of the bed. v

The purpose of the improvements which form thesubject matter of this invention consists in the construction of a simple,

' 3 ing vat with mechanical pulsations,'such as are normally employed for washing products larger than 10 millimeters.

Fig. 2 is a plan view of this vat.

Fig. 3 shows a longitudinal section of the apparatus along the line 33 in Fig. 2. Fig. 4 is a sectional elevation taken on a plane at right angles to the plane of Fig.3.

Fig. 5 represents a plan of the apparatus. 7 Fig. 6 is a sectional view taken on the line 6-6 of Fig. 5.

. Fig. 7 is a cross section of the valve along the line 77 in Fig. 6.

ill

The pistoning or pulsation is produced by a piston 1 operated by eccentrics or any other mechanism customarily employed.

The material to be washed, fed by'a conduit 2, is separated into a layer of slates S and a bed of coals G, the coals passing away above a sill 3 and the slates being evacuated 0 through the slate-evacuating compartment 4.

upper part by a compression compartment 5 which communicates by piping 6 with cylinder 7 of the apparatus for automatically regulating the evacuation of the slates. The p p g 6 c mmunicate y means of a rev- This latter compartment is extended at its.

tangular opening 8, with the interior of the cylinder 7 which opens into the atmosphere.

caused by the water in the tube 21, which 76 communicates with the atmosphere by mean-s1 of an opening '22 under the influence of the pistoning produced by the piston 1. i

At each termination of the upward stroke a the member 18 contacts with the stop 17 and pushes it to the end of the stroke. The rod 19 being guided in bearings 23 and 24, the floatj20 does not rub against the tube, 21,. it simply floats upon the liquid contained in this tube. i

The displacement-of the stop 17 upwardly in the direction of the arrow H causes the wheel or pinion 10 and the valve 9 to turn in the direction of the arrow-O; this movevmeint tends to increase the size of the communicating opening between the tube 6 and the atmosphere. j

On the rod 26 carrying the valve 9 and pinion 10 is keyed a disc 27 which can slide on the rod 26. A spring 28, adjusted by means of a nut '29. that can be displaced along a threaded -sleeve keyed tothe rod 26, applies the disc 27 against a disc 31 rigid with a worm wheel 32 loose on the shaft26 and held in place by a ring 33.

The Wheel 32 is turned in the direction of arrow F by a worm 34 controlled by means of a suitable transmission from a pulley 35. It will be seen that the wheel 32 turns, in a continuous manner by means of friction be- 10$ tween theplates 27 and 31, the valve 9 in the direction of the arrow F which tends to-close the communication between the chamber 5 and the atmosphere.

During this time the sto 17 descendsin 106 the direction of the arrow but at the terof that determined by the u ward position attained by the piece 18, that is to say by the float 20.

The volume of water delivered at each ulsat-ion b the piston 1 under the washing ed raises 1: is latter and risesin the tube 21, so much the higher as the washing bed is heavier. p

If the quantity of slates arriving in the washing apparatus exceeds the mean value, the bed of slates S tends to increase in thickness. If the bed of slates would attain its maximum thickness, the pulsation would be a maximum in the tube 21 and the stop 17 would assume .its highest position, which corresponds to the maximum opening of the valve line.

The air contained in the compression chamber 5 should communicate wit-h the atmosphere by the large 0 en orifice of-the regulatin apparatus, an the bank formed by the be of slates and limited by the sills 36 and 37 would be raised at each stroke of the piston and drawn into the slate-evacuating chamber 4, from which the slates are evacuated by piping 38. These flow out and their level tends to lower itself in the washing bed.

If the thickness of the slates bed diminishes, the ulsation diminishes correspondingly in tube 21. The valve, which is actuated by the action of the worm wheel 32 in the direction of the arrow F and which is no longer returned in the direction of the arrow 0 by the action of the piece 18 ,diminishes progressively the communication between the compression chamber 5 and the atmosphere, until it closes it completely, which checks almost totally the evacuation of the slates, because the chamber 5 being closed the air which it contains cannot escape, and prevents the water rising in this chamber under the stroke of the piston which s'uppresses entirely the flow between the sills 36 and 37 and arrests the evacuation of the slates which statically cannot escape.

Between the two extreme ositions determining the maximum evacuatlon of the slates tus enters into action and tends to restore to its best' value the thickness of the bed of slates.

The valve 9 is simply mounted with slight v friction on the end of the rod 26 which carries a feather. ][t is held in place by means of a screw 39. To clean the apparatus it is suflicient to release this screw and to withdraw the valve 9.

The pulsation, instead of being determined by a mechanical pistoning, can be efi'ected by water under pressure.

What I claim is:

1. In an apparatus for Washing coals, in combination, a perforated bed on which the materials to be washed are disposed in layers with the lightest materials at the top, a piston device for intermittently forcing water through said bed and the materials thereon, a chamber communicating with the bed through which the heavier materials are evacuated, a float responsive to the pulsations of water through said materials, a valve controlling communication of said chamber with the atmosphere and means operated by said float for governing said valve.

2. In an apparatus for washing coals, in combination, a perforated bed on which the materials to be washed are disposed in layers with the lightest materials at the top, a piston device for intermittently forcing water through said bed and the materials thereon, a chamber communicating with the bed through which the heavier materials are evacuated, a float responsive to the pulsations of Water through said materials, a valve controlling communication of said chamber with the atmosphere,continuously moving means tending to move said valve towards closed position, and means operated by said float for opening the valve to an extent correspondingto the extent of movement of said float.

In testimony whereof ll aflix my signature.

PHILIPPE WOLF. 

